Question

2. Prove that
(a) (acos +bsin )2 + (a sin - b cos b 2= a2+b2
(b) (cos+ sin )2 + (cos - sin )2 = 2
(c)(1+tan A)2 + (1 -tan A)2 = 2sec 2A

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Answer 1

Answer:

Here is the correct answer mate...

Thank you ☺✌...

Answer 2

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Refer to the attachment